This is a simple command line application that encrypts a file using a PGP public key. Many pgp utilities have you import public keys before using them which is cumbersome if you only want to encrypt one message. This tool can encrypt a file without requiring that the public key be saved to disk - the public key can be piped into the command.
To encrypt a file using a public key file, run
gpgencrypt public-keyfile file-to-encrypt
To encrypt a file using a public keyfile from the clipboard, run
pbpaste | gpgencrypt file-to-encrypt
This example works on MacOs. On Linux you can use xclip.
go mod download golang.org/x/crypto
go build
On MacOS, open the download archive, ctrl-click gpgencrypt and open the application to accept running the application. You can then use it from the command line.